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825 lines
21 KiB
825 lines
21 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* sun8i-ss-core.c - hardware cryptographic offloader for |
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* Allwinner A80/A83T SoC |
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* |
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* Copyright (C) 2015-2019 Corentin Labbe <[email protected]> |
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* |
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* Core file which registers crypto algorithms supported by the SecuritySystem |
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* |
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* You could find a link for the datasheet in Documentation/arm/sunxi.rst |
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*/ |
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#include <linux/clk.h> |
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#include <linux/crypto.h> |
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#include <linux/delay.h> |
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#include <linux/dma-mapping.h> |
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#include <linux/interrupt.h> |
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#include <linux/io.h> |
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#include <linux/irq.h> |
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#include <linux/module.h> |
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#include <linux/of.h> |
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#include <linux/of_device.h> |
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#include <linux/platform_device.h> |
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#include <linux/pm_runtime.h> |
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#include <linux/reset.h> |
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#include <crypto/internal/rng.h> |
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#include <crypto/internal/skcipher.h> |
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|
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#include "sun8i-ss.h" |
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|
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static const struct ss_variant ss_a80_variant = { |
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.alg_cipher = { SS_ALG_AES, SS_ALG_DES, SS_ALG_3DES, |
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}, |
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.op_mode = { SS_OP_ECB, SS_OP_CBC, |
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}, |
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.ss_clks = { |
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{ "bus", 0, 300 * 1000 * 1000 }, |
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{ "mod", 0, 300 * 1000 * 1000 }, |
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} |
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}; |
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static const struct ss_variant ss_a83t_variant = { |
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.alg_cipher = { SS_ALG_AES, SS_ALG_DES, SS_ALG_3DES, |
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}, |
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.alg_hash = { SS_ALG_MD5, SS_ALG_SHA1, SS_ALG_SHA224, SS_ALG_SHA256, |
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}, |
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.op_mode = { SS_OP_ECB, SS_OP_CBC, |
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}, |
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.ss_clks = { |
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{ "bus", 0, 300 * 1000 * 1000 }, |
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{ "mod", 0, 300 * 1000 * 1000 }, |
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} |
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}; |
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|
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/* |
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* sun8i_ss_get_engine_number() get the next channel slot |
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* This is a simple round-robin way of getting the next channel |
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*/ |
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int sun8i_ss_get_engine_number(struct sun8i_ss_dev *ss) |
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{ |
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return atomic_inc_return(&ss->flow) % MAXFLOW; |
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} |
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int sun8i_ss_run_task(struct sun8i_ss_dev *ss, struct sun8i_cipher_req_ctx *rctx, |
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const char *name) |
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{ |
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int flow = rctx->flow; |
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u32 v = SS_START; |
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int i; |
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#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG |
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ss->flows[flow].stat_req++; |
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#endif |
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/* choose between stream0/stream1 */ |
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if (flow) |
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v |= SS_FLOW1; |
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else |
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v |= SS_FLOW0; |
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v |= rctx->op_mode; |
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v |= rctx->method; |
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if (rctx->op_dir) |
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v |= SS_DECRYPTION; |
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switch (rctx->keylen) { |
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case 128 / 8: |
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v |= SS_AES_128BITS << 7; |
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break; |
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case 192 / 8: |
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v |= SS_AES_192BITS << 7; |
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break; |
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case 256 / 8: |
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v |= SS_AES_256BITS << 7; |
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break; |
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} |
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for (i = 0; i < MAX_SG; i++) { |
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if (!rctx->t_dst[i].addr) |
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break; |
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mutex_lock(&ss->mlock); |
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writel(rctx->p_key, ss->base + SS_KEY_ADR_REG); |
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if (i == 0) { |
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if (rctx->p_iv) |
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writel(rctx->p_iv, ss->base + SS_IV_ADR_REG); |
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} else { |
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if (rctx->biv) { |
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if (rctx->op_dir == SS_ENCRYPTION) |
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writel(rctx->t_dst[i - 1].addr + rctx->t_dst[i - 1].len * 4 - rctx->ivlen, ss->base + SS_IV_ADR_REG); |
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else |
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writel(rctx->t_src[i - 1].addr + rctx->t_src[i - 1].len * 4 - rctx->ivlen, ss->base + SS_IV_ADR_REG); |
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} |
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} |
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|
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dev_dbg(ss->dev, |
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"Processing SG %d on flow %d %s ctl=%x %d to %d method=%x opmode=%x opdir=%x srclen=%d\n", |
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i, flow, name, v, |
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rctx->t_src[i].len, rctx->t_dst[i].len, |
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rctx->method, rctx->op_mode, |
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rctx->op_dir, rctx->t_src[i].len); |
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|
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writel(rctx->t_src[i].addr, ss->base + SS_SRC_ADR_REG); |
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writel(rctx->t_dst[i].addr, ss->base + SS_DST_ADR_REG); |
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writel(rctx->t_src[i].len, ss->base + SS_LEN_ADR_REG); |
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reinit_completion(&ss->flows[flow].complete); |
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ss->flows[flow].status = 0; |
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wmb(); |
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writel(v, ss->base + SS_CTL_REG); |
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mutex_unlock(&ss->mlock); |
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wait_for_completion_interruptible_timeout(&ss->flows[flow].complete, |
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msecs_to_jiffies(2000)); |
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if (ss->flows[flow].status == 0) { |
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dev_err(ss->dev, "DMA timeout for %s\n", name); |
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return -EFAULT; |
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} |
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} |
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return 0; |
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} |
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static irqreturn_t ss_irq_handler(int irq, void *data) |
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{ |
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struct sun8i_ss_dev *ss = (struct sun8i_ss_dev *)data; |
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int flow = 0; |
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u32 p; |
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p = readl(ss->base + SS_INT_STA_REG); |
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for (flow = 0; flow < MAXFLOW; flow++) { |
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if (p & (BIT(flow))) { |
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writel(BIT(flow), ss->base + SS_INT_STA_REG); |
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ss->flows[flow].status = 1; |
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complete(&ss->flows[flow].complete); |
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} |
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} |
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return IRQ_HANDLED; |
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} |
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static struct sun8i_ss_alg_template ss_algs[] = { |
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{ |
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.type = CRYPTO_ALG_TYPE_SKCIPHER, |
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.ss_algo_id = SS_ID_CIPHER_AES, |
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.ss_blockmode = SS_ID_OP_CBC, |
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.alg.skcipher = { |
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.base = { |
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.cra_name = "cbc(aes)", |
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.cra_driver_name = "cbc-aes-sun8i-ss", |
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.cra_priority = 400, |
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.cra_blocksize = AES_BLOCK_SIZE, |
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.cra_flags = CRYPTO_ALG_TYPE_SKCIPHER | |
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CRYPTO_ALG_ASYNC | CRYPTO_ALG_ALLOCATES_MEMORY | |
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CRYPTO_ALG_NEED_FALLBACK, |
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.cra_ctxsize = sizeof(struct sun8i_cipher_tfm_ctx), |
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.cra_module = THIS_MODULE, |
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.cra_alignmask = 0xf, |
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.cra_init = sun8i_ss_cipher_init, |
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.cra_exit = sun8i_ss_cipher_exit, |
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}, |
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.min_keysize = AES_MIN_KEY_SIZE, |
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.max_keysize = AES_MAX_KEY_SIZE, |
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.ivsize = AES_BLOCK_SIZE, |
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.setkey = sun8i_ss_aes_setkey, |
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.encrypt = sun8i_ss_skencrypt, |
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.decrypt = sun8i_ss_skdecrypt, |
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} |
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}, |
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{ |
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.type = CRYPTO_ALG_TYPE_SKCIPHER, |
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.ss_algo_id = SS_ID_CIPHER_AES, |
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.ss_blockmode = SS_ID_OP_ECB, |
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.alg.skcipher = { |
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.base = { |
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.cra_name = "ecb(aes)", |
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.cra_driver_name = "ecb-aes-sun8i-ss", |
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.cra_priority = 400, |
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.cra_blocksize = AES_BLOCK_SIZE, |
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.cra_flags = CRYPTO_ALG_TYPE_SKCIPHER | |
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CRYPTO_ALG_ASYNC | CRYPTO_ALG_ALLOCATES_MEMORY | |
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CRYPTO_ALG_NEED_FALLBACK, |
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.cra_ctxsize = sizeof(struct sun8i_cipher_tfm_ctx), |
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.cra_module = THIS_MODULE, |
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.cra_alignmask = 0xf, |
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.cra_init = sun8i_ss_cipher_init, |
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.cra_exit = sun8i_ss_cipher_exit, |
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}, |
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.min_keysize = AES_MIN_KEY_SIZE, |
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.max_keysize = AES_MAX_KEY_SIZE, |
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.setkey = sun8i_ss_aes_setkey, |
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.encrypt = sun8i_ss_skencrypt, |
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.decrypt = sun8i_ss_skdecrypt, |
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} |
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}, |
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{ |
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.type = CRYPTO_ALG_TYPE_SKCIPHER, |
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.ss_algo_id = SS_ID_CIPHER_DES3, |
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.ss_blockmode = SS_ID_OP_CBC, |
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.alg.skcipher = { |
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.base = { |
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.cra_name = "cbc(des3_ede)", |
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.cra_driver_name = "cbc-des3-sun8i-ss", |
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.cra_priority = 400, |
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.cra_blocksize = DES3_EDE_BLOCK_SIZE, |
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.cra_flags = CRYPTO_ALG_TYPE_SKCIPHER | |
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CRYPTO_ALG_ASYNC | CRYPTO_ALG_ALLOCATES_MEMORY | |
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CRYPTO_ALG_NEED_FALLBACK, |
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.cra_ctxsize = sizeof(struct sun8i_cipher_tfm_ctx), |
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.cra_module = THIS_MODULE, |
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.cra_alignmask = 0xf, |
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.cra_init = sun8i_ss_cipher_init, |
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.cra_exit = sun8i_ss_cipher_exit, |
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}, |
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.min_keysize = DES3_EDE_KEY_SIZE, |
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.max_keysize = DES3_EDE_KEY_SIZE, |
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.ivsize = DES3_EDE_BLOCK_SIZE, |
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.setkey = sun8i_ss_des3_setkey, |
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.encrypt = sun8i_ss_skencrypt, |
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.decrypt = sun8i_ss_skdecrypt, |
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} |
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}, |
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{ |
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.type = CRYPTO_ALG_TYPE_SKCIPHER, |
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.ss_algo_id = SS_ID_CIPHER_DES3, |
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.ss_blockmode = SS_ID_OP_ECB, |
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.alg.skcipher = { |
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.base = { |
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.cra_name = "ecb(des3_ede)", |
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.cra_driver_name = "ecb-des3-sun8i-ss", |
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.cra_priority = 400, |
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.cra_blocksize = DES3_EDE_BLOCK_SIZE, |
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.cra_flags = CRYPTO_ALG_TYPE_SKCIPHER | |
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CRYPTO_ALG_ASYNC | CRYPTO_ALG_ALLOCATES_MEMORY | |
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CRYPTO_ALG_NEED_FALLBACK, |
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.cra_ctxsize = sizeof(struct sun8i_cipher_tfm_ctx), |
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.cra_module = THIS_MODULE, |
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.cra_alignmask = 0xf, |
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.cra_init = sun8i_ss_cipher_init, |
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.cra_exit = sun8i_ss_cipher_exit, |
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}, |
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.min_keysize = DES3_EDE_KEY_SIZE, |
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.max_keysize = DES3_EDE_KEY_SIZE, |
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.setkey = sun8i_ss_des3_setkey, |
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.encrypt = sun8i_ss_skencrypt, |
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.decrypt = sun8i_ss_skdecrypt, |
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} |
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}, |
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#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_PRNG |
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{ |
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.type = CRYPTO_ALG_TYPE_RNG, |
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.alg.rng = { |
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.base = { |
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.cra_name = "stdrng", |
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.cra_driver_name = "sun8i-ss-prng", |
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.cra_priority = 300, |
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.cra_ctxsize = sizeof(struct sun8i_ss_rng_tfm_ctx), |
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.cra_module = THIS_MODULE, |
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.cra_init = sun8i_ss_prng_init, |
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.cra_exit = sun8i_ss_prng_exit, |
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}, |
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.generate = sun8i_ss_prng_generate, |
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.seed = sun8i_ss_prng_seed, |
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.seedsize = PRNG_SEED_SIZE, |
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} |
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}, |
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#endif |
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#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_HASH |
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{ .type = CRYPTO_ALG_TYPE_AHASH, |
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.ss_algo_id = SS_ID_HASH_MD5, |
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.alg.hash = { |
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.init = sun8i_ss_hash_init, |
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.update = sun8i_ss_hash_update, |
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.final = sun8i_ss_hash_final, |
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.finup = sun8i_ss_hash_finup, |
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.digest = sun8i_ss_hash_digest, |
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.export = sun8i_ss_hash_export, |
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.import = sun8i_ss_hash_import, |
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.halg = { |
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.digestsize = MD5_DIGEST_SIZE, |
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.statesize = sizeof(struct md5_state), |
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.base = { |
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.cra_name = "md5", |
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.cra_driver_name = "md5-sun8i-ss", |
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.cra_priority = 300, |
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.cra_alignmask = 3, |
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.cra_flags = CRYPTO_ALG_TYPE_AHASH | |
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CRYPTO_ALG_ASYNC | |
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CRYPTO_ALG_NEED_FALLBACK, |
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.cra_blocksize = MD5_HMAC_BLOCK_SIZE, |
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.cra_ctxsize = sizeof(struct sun8i_ss_hash_tfm_ctx), |
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.cra_module = THIS_MODULE, |
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.cra_init = sun8i_ss_hash_crainit, |
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.cra_exit = sun8i_ss_hash_craexit, |
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} |
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} |
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} |
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}, |
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{ .type = CRYPTO_ALG_TYPE_AHASH, |
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.ss_algo_id = SS_ID_HASH_SHA1, |
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.alg.hash = { |
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.init = sun8i_ss_hash_init, |
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.update = sun8i_ss_hash_update, |
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.final = sun8i_ss_hash_final, |
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.finup = sun8i_ss_hash_finup, |
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.digest = sun8i_ss_hash_digest, |
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.export = sun8i_ss_hash_export, |
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.import = sun8i_ss_hash_import, |
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.halg = { |
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.digestsize = SHA1_DIGEST_SIZE, |
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.statesize = sizeof(struct sha1_state), |
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.base = { |
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.cra_name = "sha1", |
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.cra_driver_name = "sha1-sun8i-ss", |
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.cra_priority = 300, |
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.cra_alignmask = 3, |
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.cra_flags = CRYPTO_ALG_TYPE_AHASH | |
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CRYPTO_ALG_ASYNC | |
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CRYPTO_ALG_NEED_FALLBACK, |
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.cra_blocksize = SHA1_BLOCK_SIZE, |
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.cra_ctxsize = sizeof(struct sun8i_ss_hash_tfm_ctx), |
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.cra_module = THIS_MODULE, |
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.cra_init = sun8i_ss_hash_crainit, |
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.cra_exit = sun8i_ss_hash_craexit, |
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} |
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} |
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} |
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}, |
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{ .type = CRYPTO_ALG_TYPE_AHASH, |
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.ss_algo_id = SS_ID_HASH_SHA224, |
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.alg.hash = { |
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.init = sun8i_ss_hash_init, |
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.update = sun8i_ss_hash_update, |
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.final = sun8i_ss_hash_final, |
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.finup = sun8i_ss_hash_finup, |
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.digest = sun8i_ss_hash_digest, |
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.export = sun8i_ss_hash_export, |
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.import = sun8i_ss_hash_import, |
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.halg = { |
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.digestsize = SHA224_DIGEST_SIZE, |
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.statesize = sizeof(struct sha256_state), |
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.base = { |
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.cra_name = "sha224", |
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.cra_driver_name = "sha224-sun8i-ss", |
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.cra_priority = 300, |
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.cra_alignmask = 3, |
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.cra_flags = CRYPTO_ALG_TYPE_AHASH | |
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CRYPTO_ALG_ASYNC | |
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CRYPTO_ALG_NEED_FALLBACK, |
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.cra_blocksize = SHA224_BLOCK_SIZE, |
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.cra_ctxsize = sizeof(struct sun8i_ss_hash_tfm_ctx), |
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.cra_module = THIS_MODULE, |
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.cra_init = sun8i_ss_hash_crainit, |
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.cra_exit = sun8i_ss_hash_craexit, |
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} |
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} |
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} |
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}, |
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{ .type = CRYPTO_ALG_TYPE_AHASH, |
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.ss_algo_id = SS_ID_HASH_SHA256, |
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.alg.hash = { |
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.init = sun8i_ss_hash_init, |
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.update = sun8i_ss_hash_update, |
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.final = sun8i_ss_hash_final, |
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.finup = sun8i_ss_hash_finup, |
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.digest = sun8i_ss_hash_digest, |
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.export = sun8i_ss_hash_export, |
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.import = sun8i_ss_hash_import, |
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.halg = { |
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.digestsize = SHA256_DIGEST_SIZE, |
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.statesize = sizeof(struct sha256_state), |
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.base = { |
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.cra_name = "sha256", |
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.cra_driver_name = "sha256-sun8i-ss", |
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.cra_priority = 300, |
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.cra_alignmask = 3, |
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.cra_flags = CRYPTO_ALG_TYPE_AHASH | |
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CRYPTO_ALG_ASYNC | |
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CRYPTO_ALG_NEED_FALLBACK, |
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.cra_blocksize = SHA256_BLOCK_SIZE, |
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.cra_ctxsize = sizeof(struct sun8i_ss_hash_tfm_ctx), |
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.cra_module = THIS_MODULE, |
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.cra_init = sun8i_ss_hash_crainit, |
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.cra_exit = sun8i_ss_hash_craexit, |
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} |
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} |
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} |
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}, |
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#endif |
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}; |
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|
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#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG |
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static int sun8i_ss_debugfs_show(struct seq_file *seq, void *v) |
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{ |
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struct sun8i_ss_dev *ss = seq->private; |
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unsigned int i; |
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|
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for (i = 0; i < MAXFLOW; i++) |
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seq_printf(seq, "Channel %d: nreq %lu\n", i, ss->flows[i].stat_req); |
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|
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for (i = 0; i < ARRAY_SIZE(ss_algs); i++) { |
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if (!ss_algs[i].ss) |
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continue; |
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switch (ss_algs[i].type) { |
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case CRYPTO_ALG_TYPE_SKCIPHER: |
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seq_printf(seq, "%s %s reqs=%lu fallback=%lu\n", |
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ss_algs[i].alg.skcipher.base.cra_driver_name, |
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ss_algs[i].alg.skcipher.base.cra_name, |
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ss_algs[i].stat_req, ss_algs[i].stat_fb); |
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break; |
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case CRYPTO_ALG_TYPE_RNG: |
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seq_printf(seq, "%s %s reqs=%lu tsize=%lu\n", |
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ss_algs[i].alg.rng.base.cra_driver_name, |
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ss_algs[i].alg.rng.base.cra_name, |
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ss_algs[i].stat_req, ss_algs[i].stat_bytes); |
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break; |
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case CRYPTO_ALG_TYPE_AHASH: |
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seq_printf(seq, "%s %s reqs=%lu fallback=%lu\n", |
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ss_algs[i].alg.hash.halg.base.cra_driver_name, |
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ss_algs[i].alg.hash.halg.base.cra_name, |
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ss_algs[i].stat_req, ss_algs[i].stat_fb); |
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break; |
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} |
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} |
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return 0; |
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} |
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|
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DEFINE_SHOW_ATTRIBUTE(sun8i_ss_debugfs); |
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#endif |
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|
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static void sun8i_ss_free_flows(struct sun8i_ss_dev *ss, int i) |
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{ |
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while (i >= 0) { |
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crypto_engine_exit(ss->flows[i].engine); |
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i--; |
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} |
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} |
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|
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/* |
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* Allocate the flow list structure |
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*/ |
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static int allocate_flows(struct sun8i_ss_dev *ss) |
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{ |
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int i, err; |
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|
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ss->flows = devm_kcalloc(ss->dev, MAXFLOW, sizeof(struct sun8i_ss_flow), |
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GFP_KERNEL); |
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if (!ss->flows) |
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return -ENOMEM; |
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|
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for (i = 0; i < MAXFLOW; i++) { |
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init_completion(&ss->flows[i].complete); |
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|
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ss->flows[i].engine = crypto_engine_alloc_init(ss->dev, true); |
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if (!ss->flows[i].engine) { |
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dev_err(ss->dev, "Cannot allocate engine\n"); |
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i--; |
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err = -ENOMEM; |
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goto error_engine; |
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} |
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err = crypto_engine_start(ss->flows[i].engine); |
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if (err) { |
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dev_err(ss->dev, "Cannot start engine\n"); |
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goto error_engine; |
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} |
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} |
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return 0; |
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error_engine: |
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sun8i_ss_free_flows(ss, i); |
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return err; |
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} |
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|
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/* |
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* Power management strategy: The device is suspended unless a TFM exists for |
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* one of the algorithms proposed by this driver. |
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*/ |
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static int sun8i_ss_pm_suspend(struct device *dev) |
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{ |
|
struct sun8i_ss_dev *ss = dev_get_drvdata(dev); |
|
int i; |
|
|
|
reset_control_assert(ss->reset); |
|
for (i = 0; i < SS_MAX_CLOCKS; i++) |
|
clk_disable_unprepare(ss->ssclks[i]); |
|
return 0; |
|
} |
|
|
|
static int sun8i_ss_pm_resume(struct device *dev) |
|
{ |
|
struct sun8i_ss_dev *ss = dev_get_drvdata(dev); |
|
int err, i; |
|
|
|
for (i = 0; i < SS_MAX_CLOCKS; i++) { |
|
if (!ss->variant->ss_clks[i].name) |
|
continue; |
|
err = clk_prepare_enable(ss->ssclks[i]); |
|
if (err) { |
|
dev_err(ss->dev, "Cannot prepare_enable %s\n", |
|
ss->variant->ss_clks[i].name); |
|
goto error; |
|
} |
|
} |
|
err = reset_control_deassert(ss->reset); |
|
if (err) { |
|
dev_err(ss->dev, "Cannot deassert reset control\n"); |
|
goto error; |
|
} |
|
/* enable interrupts for all flows */ |
|
writel(BIT(0) | BIT(1), ss->base + SS_INT_CTL_REG); |
|
|
|
return 0; |
|
error: |
|
sun8i_ss_pm_suspend(dev); |
|
return err; |
|
} |
|
|
|
static const struct dev_pm_ops sun8i_ss_pm_ops = { |
|
SET_RUNTIME_PM_OPS(sun8i_ss_pm_suspend, sun8i_ss_pm_resume, NULL) |
|
}; |
|
|
|
static int sun8i_ss_pm_init(struct sun8i_ss_dev *ss) |
|
{ |
|
int err; |
|
|
|
pm_runtime_use_autosuspend(ss->dev); |
|
pm_runtime_set_autosuspend_delay(ss->dev, 2000); |
|
|
|
err = pm_runtime_set_suspended(ss->dev); |
|
if (err) |
|
return err; |
|
pm_runtime_enable(ss->dev); |
|
return err; |
|
} |
|
|
|
static void sun8i_ss_pm_exit(struct sun8i_ss_dev *ss) |
|
{ |
|
pm_runtime_disable(ss->dev); |
|
} |
|
|
|
static int sun8i_ss_register_algs(struct sun8i_ss_dev *ss) |
|
{ |
|
int ss_method, err, id; |
|
unsigned int i; |
|
|
|
for (i = 0; i < ARRAY_SIZE(ss_algs); i++) { |
|
ss_algs[i].ss = ss; |
|
switch (ss_algs[i].type) { |
|
case CRYPTO_ALG_TYPE_SKCIPHER: |
|
id = ss_algs[i].ss_algo_id; |
|
ss_method = ss->variant->alg_cipher[id]; |
|
if (ss_method == SS_ID_NOTSUPP) { |
|
dev_info(ss->dev, |
|
"DEBUG: Algo of %s not supported\n", |
|
ss_algs[i].alg.skcipher.base.cra_name); |
|
ss_algs[i].ss = NULL; |
|
break; |
|
} |
|
id = ss_algs[i].ss_blockmode; |
|
ss_method = ss->variant->op_mode[id]; |
|
if (ss_method == SS_ID_NOTSUPP) { |
|
dev_info(ss->dev, "DEBUG: Blockmode of %s not supported\n", |
|
ss_algs[i].alg.skcipher.base.cra_name); |
|
ss_algs[i].ss = NULL; |
|
break; |
|
} |
|
dev_info(ss->dev, "DEBUG: Register %s\n", |
|
ss_algs[i].alg.skcipher.base.cra_name); |
|
err = crypto_register_skcipher(&ss_algs[i].alg.skcipher); |
|
if (err) { |
|
dev_err(ss->dev, "Fail to register %s\n", |
|
ss_algs[i].alg.skcipher.base.cra_name); |
|
ss_algs[i].ss = NULL; |
|
return err; |
|
} |
|
break; |
|
case CRYPTO_ALG_TYPE_RNG: |
|
err = crypto_register_rng(&ss_algs[i].alg.rng); |
|
if (err) { |
|
dev_err(ss->dev, "Fail to register %s\n", |
|
ss_algs[i].alg.rng.base.cra_name); |
|
ss_algs[i].ss = NULL; |
|
} |
|
break; |
|
case CRYPTO_ALG_TYPE_AHASH: |
|
id = ss_algs[i].ss_algo_id; |
|
ss_method = ss->variant->alg_hash[id]; |
|
if (ss_method == SS_ID_NOTSUPP) { |
|
dev_info(ss->dev, |
|
"DEBUG: Algo of %s not supported\n", |
|
ss_algs[i].alg.hash.halg.base.cra_name); |
|
ss_algs[i].ss = NULL; |
|
break; |
|
} |
|
dev_info(ss->dev, "Register %s\n", |
|
ss_algs[i].alg.hash.halg.base.cra_name); |
|
err = crypto_register_ahash(&ss_algs[i].alg.hash); |
|
if (err) { |
|
dev_err(ss->dev, "ERROR: Fail to register %s\n", |
|
ss_algs[i].alg.hash.halg.base.cra_name); |
|
ss_algs[i].ss = NULL; |
|
return err; |
|
} |
|
break; |
|
default: |
|
ss_algs[i].ss = NULL; |
|
dev_err(ss->dev, "ERROR: tried to register an unknown algo\n"); |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
static void sun8i_ss_unregister_algs(struct sun8i_ss_dev *ss) |
|
{ |
|
unsigned int i; |
|
|
|
for (i = 0; i < ARRAY_SIZE(ss_algs); i++) { |
|
if (!ss_algs[i].ss) |
|
continue; |
|
switch (ss_algs[i].type) { |
|
case CRYPTO_ALG_TYPE_SKCIPHER: |
|
dev_info(ss->dev, "Unregister %d %s\n", i, |
|
ss_algs[i].alg.skcipher.base.cra_name); |
|
crypto_unregister_skcipher(&ss_algs[i].alg.skcipher); |
|
break; |
|
case CRYPTO_ALG_TYPE_RNG: |
|
dev_info(ss->dev, "Unregister %d %s\n", i, |
|
ss_algs[i].alg.rng.base.cra_name); |
|
crypto_unregister_rng(&ss_algs[i].alg.rng); |
|
break; |
|
case CRYPTO_ALG_TYPE_AHASH: |
|
dev_info(ss->dev, "Unregister %d %s\n", i, |
|
ss_algs[i].alg.hash.halg.base.cra_name); |
|
crypto_unregister_ahash(&ss_algs[i].alg.hash); |
|
break; |
|
} |
|
} |
|
} |
|
|
|
static int sun8i_ss_get_clks(struct sun8i_ss_dev *ss) |
|
{ |
|
unsigned long cr; |
|
int err, i; |
|
|
|
for (i = 0; i < SS_MAX_CLOCKS; i++) { |
|
if (!ss->variant->ss_clks[i].name) |
|
continue; |
|
ss->ssclks[i] = devm_clk_get(ss->dev, ss->variant->ss_clks[i].name); |
|
if (IS_ERR(ss->ssclks[i])) { |
|
err = PTR_ERR(ss->ssclks[i]); |
|
dev_err(ss->dev, "Cannot get %s SS clock err=%d\n", |
|
ss->variant->ss_clks[i].name, err); |
|
return err; |
|
} |
|
cr = clk_get_rate(ss->ssclks[i]); |
|
if (!cr) |
|
return -EINVAL; |
|
if (ss->variant->ss_clks[i].freq > 0 && |
|
cr != ss->variant->ss_clks[i].freq) { |
|
dev_info(ss->dev, "Set %s clock to %lu (%lu Mhz) from %lu (%lu Mhz)\n", |
|
ss->variant->ss_clks[i].name, |
|
ss->variant->ss_clks[i].freq, |
|
ss->variant->ss_clks[i].freq / 1000000, |
|
cr, cr / 1000000); |
|
err = clk_set_rate(ss->ssclks[i], ss->variant->ss_clks[i].freq); |
|
if (err) |
|
dev_err(ss->dev, "Fail to set %s clk speed to %lu hz\n", |
|
ss->variant->ss_clks[i].name, |
|
ss->variant->ss_clks[i].freq); |
|
} |
|
if (ss->variant->ss_clks[i].max_freq > 0 && |
|
cr > ss->variant->ss_clks[i].max_freq) |
|
dev_warn(ss->dev, "Frequency for %s (%lu hz) is higher than datasheet's recommendation (%lu hz)", |
|
ss->variant->ss_clks[i].name, cr, |
|
ss->variant->ss_clks[i].max_freq); |
|
} |
|
return 0; |
|
} |
|
|
|
static int sun8i_ss_probe(struct platform_device *pdev) |
|
{ |
|
struct sun8i_ss_dev *ss; |
|
int err, irq; |
|
u32 v; |
|
|
|
ss = devm_kzalloc(&pdev->dev, sizeof(*ss), GFP_KERNEL); |
|
if (!ss) |
|
return -ENOMEM; |
|
|
|
ss->dev = &pdev->dev; |
|
platform_set_drvdata(pdev, ss); |
|
|
|
ss->variant = of_device_get_match_data(&pdev->dev); |
|
if (!ss->variant) { |
|
dev_err(&pdev->dev, "Missing Crypto Engine variant\n"); |
|
return -EINVAL; |
|
} |
|
|
|
ss->base = devm_platform_ioremap_resource(pdev, 0); |
|
if (IS_ERR(ss->base)) |
|
return PTR_ERR(ss->base); |
|
|
|
err = sun8i_ss_get_clks(ss); |
|
if (err) |
|
return err; |
|
|
|
irq = platform_get_irq(pdev, 0); |
|
if (irq < 0) |
|
return irq; |
|
|
|
ss->reset = devm_reset_control_get(&pdev->dev, NULL); |
|
if (IS_ERR(ss->reset)) |
|
return dev_err_probe(&pdev->dev, PTR_ERR(ss->reset), |
|
"No reset control found\n"); |
|
|
|
mutex_init(&ss->mlock); |
|
|
|
err = allocate_flows(ss); |
|
if (err) |
|
return err; |
|
|
|
err = sun8i_ss_pm_init(ss); |
|
if (err) |
|
goto error_pm; |
|
|
|
err = devm_request_irq(&pdev->dev, irq, ss_irq_handler, 0, "sun8i-ss", ss); |
|
if (err) { |
|
dev_err(ss->dev, "Cannot request SecuritySystem IRQ (err=%d)\n", err); |
|
goto error_irq; |
|
} |
|
|
|
err = sun8i_ss_register_algs(ss); |
|
if (err) |
|
goto error_alg; |
|
|
|
err = pm_runtime_resume_and_get(ss->dev); |
|
if (err < 0) |
|
goto error_alg; |
|
|
|
v = readl(ss->base + SS_CTL_REG); |
|
v >>= SS_DIE_ID_SHIFT; |
|
v &= SS_DIE_ID_MASK; |
|
dev_info(&pdev->dev, "Security System Die ID %x\n", v); |
|
|
|
pm_runtime_put_sync(ss->dev); |
|
|
|
#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG |
|
/* Ignore error of debugfs */ |
|
ss->dbgfs_dir = debugfs_create_dir("sun8i-ss", NULL); |
|
ss->dbgfs_stats = debugfs_create_file("stats", 0444, |
|
ss->dbgfs_dir, ss, |
|
&sun8i_ss_debugfs_fops); |
|
#endif |
|
|
|
return 0; |
|
error_alg: |
|
sun8i_ss_unregister_algs(ss); |
|
error_irq: |
|
sun8i_ss_pm_exit(ss); |
|
error_pm: |
|
sun8i_ss_free_flows(ss, MAXFLOW - 1); |
|
return err; |
|
} |
|
|
|
static int sun8i_ss_remove(struct platform_device *pdev) |
|
{ |
|
struct sun8i_ss_dev *ss = platform_get_drvdata(pdev); |
|
|
|
sun8i_ss_unregister_algs(ss); |
|
|
|
#ifdef CONFIG_CRYPTO_DEV_SUN8I_SS_DEBUG |
|
debugfs_remove_recursive(ss->dbgfs_dir); |
|
#endif |
|
|
|
sun8i_ss_free_flows(ss, MAXFLOW - 1); |
|
|
|
sun8i_ss_pm_exit(ss); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct of_device_id sun8i_ss_crypto_of_match_table[] = { |
|
{ .compatible = "allwinner,sun8i-a83t-crypto", |
|
.data = &ss_a83t_variant }, |
|
{ .compatible = "allwinner,sun9i-a80-crypto", |
|
.data = &ss_a80_variant }, |
|
{} |
|
}; |
|
MODULE_DEVICE_TABLE(of, sun8i_ss_crypto_of_match_table); |
|
|
|
static struct platform_driver sun8i_ss_driver = { |
|
.probe = sun8i_ss_probe, |
|
.remove = sun8i_ss_remove, |
|
.driver = { |
|
.name = "sun8i-ss", |
|
.pm = &sun8i_ss_pm_ops, |
|
.of_match_table = sun8i_ss_crypto_of_match_table, |
|
}, |
|
}; |
|
|
|
module_platform_driver(sun8i_ss_driver); |
|
|
|
MODULE_DESCRIPTION("Allwinner SecuritySystem cryptographic offloader"); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_AUTHOR("Corentin Labbe <[email protected]>");
|
|
|